Jacob and MIB backstory
What happened after the incident?
How did the island end up under water?
What is Hawking always babbling about? (direct violations, etc.)
What's the loophole?
Where did the frozen wheel, statue, and temple come from?
I'd also still like to get some more with Walt.

I don't want to see their actions on island end up leading to the Alt. In other words, I don't want the alt to be the end of the story.

They originally had scheduled the week off immediately before the finale, but moved it to last night. Now we'll get finale only 5 days after episode 16 airs on 5/18. I can't believe there's only 5 hours of show left.